public class VarType {
    public static void main(String[] args) {
        byte a = 10;
        long b = 40L;
        float f = 50;
        char c = 'A';
        double PI = 3.14;
        System. out. println( "字节型, a=" + a) ;
        System.out. println("长整型, b=" + b);
        System. out. println("单精度型,f = " + f);
        System.out.println("字符型,c=" + c);
        System. out. println("圆周率,PI ="+ PI);
    }
}
